Effects of exogenous insulin, glucagon, and somatostatin on islet hormone secretion in the perfused chicken pancreas

Richard N. Honey, Michael B. Fallon, Gordon C. Weir

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

The effects of exogenous insulin were examined in the isolated perfused chicken pancreas with the duodenum excluded. At low background glucose (50 mg/dl), exogenous insulin infused at a concentration of 20,000 μU/ml elicited clear stimulation of somatostatin secretion while simultaneously inhibiting glucagon release. When the background glucose concentration was elevated to 750 mg/dl, exogenous insulin had no effect on either somatostatin or glucagon release. When graded doses of exogenous insulin were infused into the chicken pancreas at low background glucose, low concentrations (200 μU/ml) had little effect on somatostatin or glucagon release, but higher concentrations (2000 and 20,000 μU/ml) had clear effects on both somatostatin and glucagon secretion. Glucagon infused at 100 ng/ml stimulated both insulin and somatostatin release. When somatostatin was infused at 25 ng/ml, clear inhibition of glucagon was seen with insulin inhibited to a lesser extent. This study supports the notion of a negative feedback relation between B and D-cells of the pancreatic islets and suggests a paracrine mediation.

Original languageEnglish (US)
Pages (from-to)1242-1246
Number of pages5
JournalMetabolism: Clinical and Experimental
Volume29
Issue number12
DOIs
StatePublished - Jan 1 1980
Externally publishedYes

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

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